export default function scrollIntoView (container, selected) {
  if (!selected) {
    container.scrollTop = 0
    return
  }

  const top = selected.offsetTop
  const bottom = selected.offsetTop + selected.offsetHeight
  const viewRectTop = container.scrollTop
  const viewRectBottom = viewRectTop + container.clientHeight

  if (top < viewRectTop) {
    container.scrollTop = top
  } else if (bottom > viewRectBottom) {
    container.scrollTop = bottom - container.clientHeight
  }
}
